/*首先给外层加定位*/
.scale{
	position: relative;
	margin-left: 20px;
	margin-top: 10px;
}

/*遮罩层加黑色透明覆盖*/

.scale>div:nth-child(1)>div:nth-child(2){
	background: rgb(244,244,244,.5);
}
.scale>div:nth-child(1)>div:nth-child(3){
	overflow: hidden;
	display: none;
}

.scale>div:nth-child(2){
	overflow: hidden;
	display: none;
}

.scale *{
	position: absolute;
}

#glasses{
	background:rgba(244,244,244,.5);
}
